Mexican consumer prices in December dipped below the central bank’s 4 percent tolerance ceiling for the first time in seven months, further diminishing chances of an interest rate rise any time soon. Mexican consumer prices rose 3.57 percent in the year through December, slower than November’s 4.18 percent and below expectations in a Reuters poll for 3.71 percent, the national statistics agency said on Wednesday. Consumer prices picked up 0.23 percent last month, down from the 0.68 percent rate reported in November and below the 0.34 percent expected in a Reuters poll.